Improvement in sewing-machines



L. l. CRECELIUS.

Sewing-Machine.

Part'en'ted'lulyZ-Y,1875.

FIG. 5.

FIG.1.

FIG. 4..

FIG.3.

INVENTUR:

W Ey S I www @wwf NLPETERS. FHOTo-LnHoGRAPHEn. WASHINGTON. Dv C.

UNITED STATES PATENT @EEIGEc LQUI'S J. CRECELIUS, OF ST. LOUIS',MISSOURI.

IMPROVEMENT IN SEWING-MACHINES.

SpeciIication formingipartiof Letters Patent No. l 66,071, dated July27, 1875; application Iil'cd May 24,1875.

To all whom it may concern:

Be it known; that LLoUIs lUREcELIUs, of St. Louis, in St. Iiouis county,State of Missourihave invented certain new and useful Improvements in`Sewing-Machines, of which thefollowin g is ai specification:

The irst part of my inventioiris a contrivance to prevent the droppingof stitches. This I accomplish by causing the hook which takes theathread oi the needle tovibrate on or with the spool-case holder.. By theterm hook I Wish to be understood, whenever that term is herein used, asmeaning that part of the machinery, whatever its form may be, whichperforms the task` of taking the thread off the needle. This vibrationof the hook is effected by providing the same with a pliant spring, bymeans of which said hook is sprung in such a lnanner as to be always inthe way toencouuter the descending needle, even if the latter shouldaccidentally deviate from its regular line of descent, which may happenby encountering hard substances, or by becoming bent, Sac. This hook maybe applied to any sewing-machine, and be made in any form to suit therespective machinery to which it may be attached.

The second part of my invention relates to that class of sewing-machineswhich are constructed like or similar to the Wardwell sewing-machine.The object of this part of my invention is, first, to lessen the strainand wear on the thread; second, to diminish the noise of the machine,and, third, to insure regularity in the stitches, and an even tension.All this I accomplish by making a notch in the spool-case stay, or,according' to circumstances, in the spool-case ringer. This notch Idesignate by the name of escape-notch.

By referring to the Wardwell machine it will be seen that the spool-casefinger, while it plays in the slot of the spool-case stay, bears againstone side thereof when in operation, and, as the thread has to pass onboth sides of the spool-case finger within the said slot, thebearing ofthose two parts against each other impedes the free passage of thethread on that side.

By my invention this is avoided,for on that side I sink a notch, calledescape-notch, as aforesaid, into one of said members, into which thethread escapes during itspassage` around that side, and thereby avoidsbeing rubbed by said parts. If the machine be so constructed that themotion of the spool-case-stay is vertical in time with the hook, thenthe escape notch should be in the spool-case finger. It' horizontal orrotary in such time, then it should be in the spool-case stay.

FigureI is a front View of a spool-case (as in the Wardwellsewing-machine) embodying my invention. Fig. II is a plane view of thesamev as seen from above. Fig. III isl also a front view, showing thehook iny a` position different from that in Fig. I. Fig. IV is anotherplane view, showing the hook` in position as in` Fig. III. Fig. V is4 aside view, showing the position ofthe hook when the threadv is drawn outof the spool-case nger. Fig. VI is a front view ol' the latter. Fig. VIIrepresents the hook enlarged in form, as applicable to the Ward'-wellsewing-machine. Fig. VIII is a front View of a part of a spool-caseof the Wardwell machine. This, as well as the next gure, represents theapplication of my escape-notch in a case where the motion of thespool-case stay is vertical in time with the hook, the escapenotch beingin the spool-casefinger in this instance. It shows here the spool-caselinger with the escape-notch therein, the spool-case stay being abovethe escape-notch. Fig. IX is a like view, but with stay belowtheescapenotch. 1

, A is the spring of Fig. VII, which causes the hook to vibrate. Thisspring is very pliant, yielding to a very slight pressure. B is thepoint of the hook, Fig. VII, by which it receives the thread 5 (l, theguard of said hook; D, the pivot thereof, on which it hinges; E, thespool-case finger; F, the spool-case stay; G, the notch (calledescape-notch) therein, it being in its place when the motion. of thespool-case stay is horizontal or rotary in time with the hook. H is aspool in position. I is the revolving spool-case holder. a a representthe front thread; b b, the back thread. The dotted lines show thepositions thereof on that side of the machinery which is opposite to theview presented. v

The hook, Fig. VII, is fastened to the spoolcase holder, or itsequivalent, in such a manner that the spring A rests and presses againsta support in the part it is fastened to. The point B will thereby bemade to stand out far enough to meet the descending needlel if it shouldrange outwardly of its designed line; but if it descend in its properline, or inwardly thereof, then the needle, while sliding along theguard G, will, on account of the pliancy ot the spring A, press the hookinto such a position that the point B will invariably meet the needle atthe proper time and take od' the thread. Thus, should the needleaccidentally deviate from its proper line to either side, even to itsutmost limits, the point B will invariably ineetitatits actual descent,take oft' the thread,

Vand thus obviate the dropping` of stitches.

While this vibratory hook is applicable to all sewing-machines, withsuch changes in the form as each particular machine will naturallysuggest, the escape-notch-z'. e., the second part of my invention-is, asfar as I am aware, only applicable to machines constructed on such orsimilar principles as the' Wardwell machine.

Concerning this second part of my invention-the escape-notch G-I willonly add to what has already been said: Assuming the motion of thespool-case stay F to be horizontal or rotary in time with the hooki. c.,at the moment when the needle meets the hook-then, when the hook, Fig.VII, assumes a position about as shown in Fig. I, the front thread c ahas entered the escape-notch G, as shown in Fig. II, and the spool-caselinger E is on one side of the escape-notch G. When the hook, Fig. VII,has a position as in Fig. III, the spool-case stay F has moved forward,and the spool-case finger E, after having passed over the escape-notchG, is on the other side thereof, as shown in Fig. IV, and the thread a.a. is carried through the escape-notch G. When the hook, Fig. VII, is inposition as shown in Figs. V and VI, the thread has entirely passed outof the escape-notch G.

Figs. VIII and IX are merely to show the arrangement When the motion ot'the spoolcase stayis vertical. Hence, there the escapenotch G is in thespool-case finger.

' It is obvious that it would make no essential ditference Whether theescape-notch be in the spool-case stay or in the spool-case n ger; andit is equally obvious that it will make no essential difference in thisinvention whether the'hook alone, or it with the part to which it isattached, be made movable or vibratory.

I claim as my inventionl. The combination, with a revolving spoolcaseholder, of a movable or vibratory hook projecting beyond the edge ofsaid holder, and operated by spring-power, whereby the said hook isalways brought in line with the path ofthe needle, substantially as andfor the purposes described.

2. The combination, with the spool case holder, ofthe spring A, point B,needle-guard C, and pivot D, as and for the purposes set forth.

3. The combination, with the spool-case stay F, provided with theescape-'notch G, ot' the spool-case finger E, the several parts beingconstructed and relatively arranged as shown and described.

LOUIS J. CREOELIUS.

Witnesses:

FREDERICK SPIEs, CHAs. F. MEISNER.

